[PATCH 2/2] Enable zeroing of io_poll statistics
flat view
STALE3688d
From: Stephen Bates <hidden>
Date: 2016-09-13 18:23:16
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
Allow the io_poll statistics to be zeroed to make for easier logging of polling event. Signed-off-by: Stephen Bates <redacted> --- block/blk-mq-sysfs.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c
index ea8c3f5..ac5160e 100644
--- a/block/blk-mq-sysfs.c
+++ b/block/blk-mq-sysfs.c@@ -181,6 +181,14 @@ static ssize_t blk_mq_hw_sysfs_poll_show(struct blk_mq_hw_ctx *hctx, char *page) hctx->poll_success); } +static ssize_t blk_mq_hw_sysfs_poll_store(struct blk_mq_hw_ctx *hctx, + const char *page, size_t size) +{ + hctx->poll_considered = hctx->poll_invoked = hctx->poll_success = 0; + + return size; +} + static ssize_t blk_mq_hw_sysfs_queued_show(struct blk_mq_hw_ctx *hctx, char *page) {
@@ -303,8 +311,9 @@ static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_cpus = { .show = blk_mq_hw_sysfs_cpus_show, }; static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_poll = { - .attr = {.name = "io_poll", .mode = S_IRUGO }, + .attr = {.name = "io_poll", .mode = S_IWUSR | S_IRUGO }, .show = blk_mq_hw_sysfs_poll_show, + .store = blk_mq_hw_sysfs_poll_store, }; static struct attribute *default_hw_ctx_attrs[] = {
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2.1.4